Flow measurement refers to the measurement of electricity, gas, heat or water consumption. When the results of a flow measuring instruments are used for pricing the use of electricity, water, heat or gas, the acquisition and use of the instrument must comply with the requirements set by the Measuring Instruments Act (707/2011).
A distinctive characteristic of measuring instruments is that the correct invoicing of an individual client typically relies on only one instrument. It is therefore important to maintain the condition of the entire stock of instruments. The responsibility for maintaining the instruments lies with the service provider, in other words the electricity, water and sewage, heat energy or gas provider using the measurement as the basis for invoicing clients. This responsibility does not depend on the ownership of the measuring instrument. The invoicing party must ensure that the measuring instrument suits its purpose and environment, that it always functions reliably, and that its use fulfils the requirements of the Measuring Instruments Act.
The same requirements also apply to instruments for individual flats if invoices are based on their measurements.